Reproduction is ajoint venture in which both males and females participate. Reproductive disorders are more apparent in females hence failures are often attributed to female gender only. A close examination of the process however reveals that males are as great offenders as females to cause infertility problems. The male should provide sperms which are competent to fertilize the ovum. Whenever there is large-scale problem of infertility in a herd or in large number of females the male is always seen with suspicion. In addition to productive efficiency the clinical examination of the bull for its reproductive efficiency is gaining more and more popularity. This compendium cum workbook has been attempted with the expectation that it would fulfill this long felt need and would provide necessary guidelines to the B.V.Sc.